Taxella gracilicaulis ( Jäderholm, 1903 )

Galea, Horia R. & Maggioni, Davide, 2020, Plumularioid hydroids (Cnidaria: Hydrozoa) from off New Caledonia collected during KANACONO and KANADEEP expeditions of the French Tropical Deep-Sea Benthos Program, European Journal of Taxonomy 708, pp. 1-58 : 7-8

Taxella gracilicaulis ( Jäderholm, 1903)

Fig. 2I

Taxella gracilicaulis – Ronowicz et al., 2017: 19, figs 7b, 9.

Material examined

PACIFIC OCEAN • several colonies, 5.5–20 cm high, some with gonothecae; off New Caledonia, stn DW4741; 22°52′ S, 167°41′ E; 210– 210 m; 23 Aug. 2016; KANACONO leg.; MNHN-IK-2015-571 .

Remarks

For a synonymy, a recent redescription and taxonomical notes, refer to Ronowicz et al. (2017). Good illustrations are to be found elsewhere: for the general appearance of the colony, see Jäderholm (1903, as Lytocarpus gracilicaulis ), and for microscopic details Hirohito (1995, as Halicetta gracilicaulis ). Its

systematic affinities with Taxella eximia (Allman, 1874) are unsettled yet, as revealed by analyses with molecular markers ( Ronowicz et al. 2017; Moura et al. 2018), and both may prove conspecific.

Distribution

South Africa ( Millard 1975), Red Sea ( Vervoort 1967), Indonesia ( Billard 1913), Korea ( Rho 1969), Japan ( Jäderholm 1903; Hirohito 1995), Australia ( Watson 1997).

Figures

Fig. 2. A–H. Aglaophenia digitulus Vervoort & Watson, 2003, stem internode from monosiphonic part (A); hydrotheca in lateral (B), frontal (C) and apical (D) views; modified, distal part of a cladium with corbula (E); pseudophylactocarp (F) and details in lateral (G) and frontal (H) aspects; A, E–H from sample MNHN-IK-2015-578; B–D from sample MNHN-IK-2015-569. — I. Taxella gracilicaulis (Jäderholm, 1903), three cormidia from sample MNHN-IK-2015-571. Scale bars: A = 500 µm; B–C, F = 300 µm; D, G–I = 200 µm; E = 1 mm.